ADXL180
Rev. 0 | Page 46 of 56
RECEIVE DATA FRAME (14 BITS)
CONFIGURATION MODE COMMAND (RECEIVE)
COMMUNICATIONS PROTOCOL
The 8-bit configuration register data is passed to the ADXL180
with a read/write command bit, a 4-bit configuration register
address, and a parity bit as shown in Figure 37. The read/write
bit is set to indicate the desired action. A 0 indicates a write
operation and a 1 indicates a read operation. The parity bit is set
for even parity. The parity bit should be set to 0 or 1 to make the
total number of 1s in the data frame even. The data is
transmitted LSB first as shown in Table 42.
DATA
ADDRESS
P
2
1
0
TRANSMITTED
FIRST
2
1
0
7
6
5
4
3
0
R/W
0
3
07
54
4-
05
9
Figure 37. Configuration Mode Command (Receive) Data Frame
Table 42. Configuration Mode Transmit Data Bit Mapping
DB15 DB14 DB13 DB12 DB11 DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2
DB1
DB0
Parity
Addr 3
Addr 2
Addr 1
Addr 0
Data
Bit 7
(MSB)
Data
Bit 6
Data
Bit 5
Data
Bit 4
Data
Bit 3
Data
Bit 2
Data
Bit 1
Data
Bit 0
(LSB)
State
Vector 2
State
Vector 1
State
Vector 0
